Leveling-rod.



W/TYNESSES A TTOHN E YS rr Erre.,

FEDERICO WULFF, OF TORREON, MEXICO.

LEvELING-ROD.

Application filed February 14, 1907. Serial No. 357,314.

To all whom 'it may concern:

Be it known that l, FEDERICO WULEF, a citizen of the United States, and a resident of Torreon, Coahuila, Mexico, have invented a new and Improved Leveling- Rod, of which the following is a full, clear, and exact description.

This invention is directed to an improved leveling rod as used by surveyors and others in measuring the relative heights of different elevations.

The rod embodies in its construction means whereby it is possible to easily take the reading on a horizontal line, through a level, to the small fractional part of a dimension and accomplish this directly without referring to the unit marks on the rod below or above the reading and without undue straining of the eyes. I accomplish these objects by covering the rod with graduations on all sides, which provides sufficient space for marking the figures in large type, the graduations of cach succeeding side of the rod differing by a fraction of a unit, which gives the graduations a spiral trend thereabout.

Reference is to be had to the accompanying drawings forming a part of this specification, in which similar characters of reference indicate corresponding parts inall the figures.

Figure l is a side elevation of one embodiment of my invention; Fig. 2 is a cross section substantially on the line 2 2 of Fig. l, Fig. 3 is a development in the plane of the paper of the graduations on the upper portion of the rod, and Fig. 4 is a corresponding development of the graduations on the lower portion of the rod.

In carrying out my invention, I preferably employ a hollow casing or member, which forms the lower portion of the rod, said casing being substantially square in cross section with the corners diagonally removed, forming an eight-sided ligure. At each corner of said figure, this portion of the rod is provided with beads 2 separating the adjacent faces, At the upper end of the casing l, a lug 3 is formed at one corner, through which is threaded a set-screw 4, preferably constructed with a milled head 5. This set-screw is for bindingly engaging a casing 1fL in all respects similar to the casing l, but sufliciently smaller in diameter to freely slide and neatly fit therein. The beads 2a of the casing 1n corresponding to the beads 2 of the casing l, are the only bearing surfaces between the two sections of the rod. The casing 1a is lled with wood or other like material G, or if desired may loe left open and itself receive a section of the rod.

The construction of the rod, as above described, is not the principal feature of my invention as said principal or primary feature may be applied to rods of other Specification of Letters Patent.

Patented Jury 3o', 1907.

forms. This consists in providing the rod on its different faces each with a column of graduations, the graduations of each succeeding column indicating different fractional parts of the same unit. The numbers marking the different levels are thus given sufficient room to permit them to appear in large type. These numbers, as shown, are marked on the wide outer faces, as more clearly illustrated in Figs. 3 and 4. The spaces between the different dimensions on the rod are preferably made in alternately different colors, as shown, in order that they may be clearly distinguished. On the diagonal corners of the rod graduations are provided which indicate dimensions occupying a position intermediate the dimensions marked on adjoining faces. These graduations or markings may be further subdivided, as indicated at 7 of Fig. 3. By this arrangement of the markings on the rod, the graduations in the different columns will, in effect, spirally pass thereabout.

lt is obvious that rods of varying construction may be employed in connection with the mode of marking, as described, also various other immaterial changes may be made in the construction without departing from the spirit of my invention or sacrificing any of the advantages thereof.

Having thus described my invention I claim as new and desire to secure by Letters Patent: i

1. A leveling rod having a plurality of columns of graduations with the `graduations of each column indicating different fractional parts of the same unit and an intermediate colulnn of graduations subdividing the graduations of the irst named columns.

2. A leveling rod having a plurality of faces which areA alternately wide and narrow, columns o1 graduations on said wide faces indicating different fractional parts of the sameY unit, and columns of graduations on said narrow faces subdividingl the graduations of the first-named columns.

3. A leveling rod comprising an angular casing having a plurality of faces which are alternately wide vand narrow with beads formed at the corners of the casing, a second casing of corresponding cross section slidable within the Iii-st, and means for holding said casings against relative movement.

4, An extensible leveling rod, composed of a plurality of casings slidable one within the other, each casing having a plurality of faces which are alternately wide and' narrow, columns ot graduations on said wide faces indieating different fractional parts of the same unit, and columns of graduations en said narrow faces subdividing the graduations of the first-named columns.

In testimony whereof l have signed my name to this specification in the presence of two subscribing' witnesses.

FEDERICO WULFF.

Witnesses z Fl. F. FLETCHER, J. N. RoUsE. 

